This doesn't answer your question per se, but here's a post of his pics/info:

http://www.thesamba.com/vw/forum/viewtopic.php?t=292773&highlight=throttle+body

I have no affiliation with him. Just happened to remember seeing the post.

Cheers,

Neil.

On Tue, Jul 22, 2008 at 10:53 AM, Kenneth Lewis <kdlewis@northstate.net> wrote:
> Very good observations. I'll ask him if he emails me back.
>
> Did anyone notice the billet throttle body? I wonder how that works in
> conjunction with the OEM ECU?
>
> Ken
>